use for enemy destroy when outside of screen behavior … or set condition when animation 1 for the enemy is finished … set an action delete object (enemy).
This may have something to do with it. If any NewSprite has the default animation, then this will always trigger life1 will be set to 1 all the time, meaning the following event won’t ever be executed (which, btw, should have a trigger once in the conditions) :
Also, I suggest you give the sprites meaningful names, and fill in all parameters in the actions for the force action. This will avoid confusion and remove chances of errors occurring or affecting your game.